Magazine-gun.



No. 656,807. Patented Aug. 28, I900. B. BURTON. MAGAZINE GUN.

(Application filed Sept. 24, 1898.) (No Model.) 4 SheaIsSheat I.

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MAGAZINE GUN.

(Application filed Sept. 24, 1898.)

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Patented Aug. 28, I900.

B. BURTON. MAGAZINE sun;

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(No Model.)

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Altomey No. 656,807. Paitented Aug. 28, 1900.

B. BURTON.

MAGAZINE GUN.

(Application filed Sept. 24, 1898.) (No Model.) 4 Sheets$heat 4.

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BETHEL BURTON, on NEW YORK, N. Y., ASSIGNOR TO WI FIELD e. BURTON AND HENRY o. BURTON, F SAME PLACE.

MAGAZINE-GUN.

SFEGIFICATION forming part of Letters Patent-(No. 656,807, dated August 28, 1906. Application filed September 24, 1898; Serial No. 691,788. (No model.)

To all whom it may concern.-

- Be it known that I, BETHEL BURTON, a citizen of the United States, residing at New York, (Brooklyn,) in the county of Kings andState of New York, have invented certain new and useful Improvements in Magazine-Guns, of which the following is a specification, reference being had therein to the accompanying drawings.

to Thisinventionrelatestomagazine=firearms, and especially to the class thereof in which the breech is closed and locked by a reciprocatory bolt, although in some of its details it is not limited thereto.

Primarily the object of my invention is the provision of a magazine-gun in which the bolt is locked by a mutilated screw connection thereon which when the bolt is forced forward to close the breech and is turned or rocked will engage with similar screw connections in the receiver, and thereby be retained securely in its closed position.

A further object of the invention is the provision of improved means for actuating the bolt and for connecting it'with devices for operating the cartridge-carrier in the magazine of the gun.

A further object of the invention is the provision of means in connection with the bolt 0 for setting the firing-pin in its safety position and for releasing it from such position by a simple movement when it is desired to bring the gun into action.

A further object of the invention is the provision of a bolt having sets or segments of screw-threads separated quite adistance from each other and cooperating with similarlyformed threaded surfaces in the receiver of the gun, whereby when the bolt is rocked to 40 cause said threaded surfaces to intermesh it will be securely locked in position to close the breech.

A further object of the invention is the provision of a bolt having a longitudinal groove 5 on its under side terminating in a lateral extension having walls the pitch or incline of which is the reverse of that of the screwthreaded connection adjacent thereto, said groove cooperating with one arm of a lever connected with the cartridge-carrier in the magazine, which arm prevents the bolt from turning in its seat until it is fully closed, and the inclined walls of the lateral extension of said groove serving to force said lever to a position to cause it when the bolt is turned to force the carrier to its lowest position in the magazine and to firmly secure it in such position. I

A further object of the invention is the pro vision of a cover for excluding dust or sand from the bolt and magazine, said cover being detachably connected with a sleeve through which the bolt loosely passes.

A further object of the invention is the pro vision of improved means for actuating the bolt and its accessories and for positively con= trolling the rising and falling movements of the cartridge-lifter at the limit of each for ward-and-backward movement of said bolt.

In the accompanying drawings, in which like characters designate like parts throughout the several views, Figure 1 is a side elevation of that part of a gun containing the breech mechanism, illustrating the side of the magazine and the position of the bolt-operating lever when the bolt is closed and locked. Fig. 2 is a side elevation, partially in section, of a cover for the bolt. Fig. 3 is a plan, and Figs. 4 and 5 are respectively opposite end views, of the bolt-cover. Fig. 6 is a plan view of the under side of the bolt, showing two of the segments of screw-threads and the longitudinal groove, withits lateral extension, hav ing inclined walls the pitch of which is the reverse of that of said screw-threads. Fig. 7 is a rear end view of the bolt, showing the cam=surface thereon. Fig. 8 is a longitudinal vertical section of the bolt mechanism of the gun, illustrating said mechanism closed and the cartridge-carrier at the limit of its downward movement. Fig. 9 is a transverse vertical section of the gun, taken on or about the line of the trigger-guard and cutting the trigger just in rear of the sear, the bolt being in a closed and locked position. Figs. 10 and 11 are respectively a side and a plan view of the man ually-actuated lever by which the bolt is operated. Figs. 12 and 13 are respectively end and plan views of the sleeve carrying the pivot for fitting in an opening of said manu- ICO ally-actu ated lever,the bolt-cover being shown in section in Fig.12. Figsl and 15 are respectively elevation and sectional views of a collar attached to the bolt, said collar cooperating with a socket in the handle-lever for turning the bolt. Fig. 16 is alongitudinal section of the bolt mechanism retracted and other parts cooperating with said mechanism, the cartridge-carrier being shown with a cartridge thereon in position to be pushed into the barrel on an advancing movement of the bolt.

Fig. 17 is a plan View of the receiver, maga-.

zine, and bolt-operating mechanism. Fig. 18 is a bottom plan view of the receiver, the magazine being omitted. Fig. 19 is a detail in cross-section of the cartridge-carrier and its operating-lever, showing the manner in which said parts are connected. Fig. 20 is a side View, partiallyin section, of the strikerhead and its connections detached. Fig. 21 is a sectional detail of the parts illustrated in Fig. 20, showing the safety-detent by which the firing-pin may be retracted, so that a pull on the trigger to release the sear will not cause said pin to explode a cartridge. Fig. 22 is a transverse vertical section taken just in rear of the detent for the magazine-cover. Fig. 23 is a plan View of the bolt-cover, showing a means by which it may be connected to the sleeve for securing it to the bolt so that it will reciprocate with said bolt.

Referring to the accompanying drawings, the stock of the gun is designated by A, the barrel by B, the trigger-guard by O, and the receiver by D, said parts being generally of conventional construction.

Attached to the side of the receiver in a manner hereinafter described is a magazine E, which is of a size sufficient to contain a number of cartridges and to feed said cartridges seriati'm by gravity to the cartridgecarrier through an opening, (indicated by dotted lines in Fig. 1,) said carrier moving from the position shown in Fig. 8 to that illustrated in Fig. 16 as the bolt is withdrawn to its extreme rearward position.

As illustrated, the bolt consists of a tubular body or shell 1, with interrupted screwthread sections 2 2 located a distance apart thereon, said sections being adapted to engage with corresponding threaded segments 3 '3 of the receiver when the boltis advanced to close the breech and is turned to cause the screw-threads to engage and to firmly lock said bolt in its forward position. Any desired number of these screw-segments suitable for accomplishing the purpose may be employed, and for convenience a set of three of these segments is shown located in the receiver and on the bolt and adapted to cooperate and lock the bolt in position when it is advanced to close the breech. As shown, the surfaces of the threaded segment 3 in the receiver adjacent to the bore of the barrel serve as projections over which the cartridge is forced, (its bullet end being lifted by the bolt as it enters the barrel, and is thereby given a slight vibration,which prevents jamming, and thereby causes it to be forced home more bolt has been unlocked, as just described,

easily and to be guided to its seat without in: terference and with less friction than if a smooth surface were employed.

Located on the bolt, near its rear end, is a shoulder 00, and fitted over said bolt and resting against said shoulder is a sleeve 5, to which the bolt-cover (designated by 6) may be attached in any suitable manner-as, for instance, bya tongue-and-grooved connection 6 and a screw 6 (Shown by dotted lines in Fig. 23.) Ways '7 (see Fig. 16) are provided in the upper part of the receiver, so that said bolt cover may reciprocate longitudinally only and is prevented from rotary movement with the bolt when the latter is locked to close the breech, said sleeve 5 permitting the bolt to rotate therein when itis turned to its locked position. Depending from the sleeve 5 are projections 10, (see Figs. 9 and 12,) which en ter a groove 11 in the receiver when the bolt is nearly closed, thus holding and guiding the sleeve at the bottom as well as at the top, as above described.

Located in a recess of the cover 6 is a cartridge-shell extractor, (designated by F, see Figs.8 and 16,) which operates in a well-known manner.

Projecting from the sleeve 5 is a pintle or pivot, (designated by the numeral 15,) upon which the operating-lever 16 is mounted for swinging movement, said lever being loosely and detachably held to the pintle by a screw 17, Figs. 1 and 17, or in any other suitable Ico manner, and having a hand-grasp 18 and an F arm 19, located at an angle to the main body of the lever, in which arm a socket 20, Fig. 9, is formed for a purpose hereinafter stated.

Adjacent to the sleeve 5 on the bolt a collar, (designated by 21,) is firmly attached to said bolt by a screw 22, Fig. 8, or in any other suitable manner, and this collar has projecting from one side thereof a projection 24, with a ball-shaped or rounded tip, the latter enno tering a socket 20 in the arm 19 of the ban? die-lever, as shown in Fig. 9, and said collar serving to restrain the sleeve 5 from independent backward movement.

By reference to Fig. 1, in which the lever 16 is shown by full lines in the position it occupies when the bolt is closed and locked, it will be seen that arearward pull on the handle18 will swing said lever from the position mentioned to that shown by dotted lines in said figure and by the engagement of the projection 24 with the socket 20 will partially rotate the collar 21 and its attached bolt to cam back the striker head, unlock said bolt, and thereby impart to the same by the reverse action of the screw-threads 2 and 3 an initial backward movement to cause the extractor F to loosen the cartridge-shell in the bore or chamber of the gun. After the I 0 the longer arm of the lever 16 will be in a position substantially conforming to the longitudinal axis of the bolt, and the latter may then be withdrawn to the limit of its rear-- ward position by a direct pull on said han dle, the firing-pin being set. In this way the bolt may be operated more accurately and with an expenditure of less power than if the lever 16 were difierently disposed.

At its rear end the body of the bolt is equipped with a cam-surface'26, (see Figs. 6 and 7,) whereby upon the partial rotation of said bolt this surface will bear against asimilarly-formed cam-surface on the striker-head and will force back the same. Preferably the collar 21 is reduced in diameter and ex tended for some distance at its rear end, so that it will cover the joint between the striker-head 30 and sleeve and permit the striker to close therein, and thereby be protected from dust, said collar being cut away on its under side to permit the necessary movements of the striker-head. Attached to or forming a part of the striker-head 30 is an extension (see Figs. 20 and 21) for engaging the sear H when the bolt is pushed forward and is rotated to-close it in locked position. Preferably this striker-head 30 is in the form of a sleeve, in which a smaller sleeve 63 may be adjusted by means of a screw-threaded connection, the rear end of said sleeve 63 havin gacam-face 63,'which cooperates with a cam-face 71 on the forward end of the firing-pin head 60, the latter having an armor lever 62 projecting from its side. By turning the head 60, through the instrumentality of the wing 62, the cam 71 on said head, being in engagement with the corresponding cam 63 on the sleeve 63, forces back the firing-pin head and the firing-pin to such a position that the latter cannot reach the cartridgein the breech of the gun if the sear should be released by the trigger to permit the striker-head to advance, and it will thus be seen that the wing 62 serves to indicate either the safe or the firing position of the firing-pin.

On its under side the bolt 1 has a longitudinal groove 33, with a lateral extension 34, having inclined walls the pitch of which is the reverse of that of the screw-threads 2, the extension of said groove permittinga locking and unlocking movement of the bolt, and the inclined walls thereof serving to actuate the cartridge-carrier in a manner hereinafter described.

Connected with the cartridge-carrier 50 is a pivoted lever 41, having an arm 40, which extends into the groove 33 of the bolt and prevents the turning of the same until said bolt is advanced to its fully-closed position, when said arm 40 will enter the lateral extension 34 of said groove 33 in the bolt, the inclined walls of which when the boltis turned to lock the same will engage with said arm 40 of the lever 41 and cause the same to throw down the cartridge-carrier 50 to its lowermost position and to lock the same in such position, as shown in Fig. 8. This construction permits a straight longitudinal reciprocation of the bolt, so that when the latteris fully retracted aforward push on the handle 18 cannot rotate the bolt by turning the collar 21, said collar being secured to the bolt,as above described,and the latter being prevented from turning by the'engagement of the arm 40 with the walls of the groove 33. hen, however, the bolt is closed, a continuation of the forward movement of the hand-grasp 18 of the lever 16 reverses this opening movement of the bolt, and as the groove 34 permits the bolt to be turned when closed the screw-locking devices will draw the bolt. to its locked position, which position is the only one in which the firingpin may move forward to explode the car tridge, owing to the cam engagement of the bolt with the striker-head 30. The groove 34 is so disposed in the bolt that when the latter is forced forward and turned to cause the segments of screw-threads to engage said groove will by the slight longitudinal movement of the bolt,due to the lead of the threaded segments on the bolt and in the receiver, be brought into such position that the arm 40 will closely engage with the inclined walls of said groove, and as said walls are of reverse pitch to that of the screw-threads 2 and 3 the said arm and the lever 41 will be positively forced forward, thereby lowering the cartridge-lifter 50 to the position illustrated in Fig. Sand locking said litter in such position.

The magazine E may be detachably connected to the receiver by means of tongues on the former entering grooves 43 (see Fig. 18) in the latter, and the side of the receiver has a passage through which a cartridge may pass from said magazine to the carrier 50. This carrier 50 is pivoted to the lever 41, which may be pressed upward by a spring 45, although the latter is not essential, and said carrier has extending forward of the pivot by which it is held to the lever 41 an arm or toe 51, which engages a suitable abutment 53- for instance, the bottom plate of the receiverwhen the lcver4l is down, and thereby swings the carrier on its pivot to permit a cartridge to pass thereon from the magazine. As above stated, the closing of the bolt forces the carrier 5O downward and locks the same in such position by theengagement of the walls of the groove 34 with the arm 40 of the carrierlever 41, so that the final movement of locking the bolt throws the carrier to such position that a new cartridge may be fed by gravity from the magazine thereon, and this construction is such that a second cartridge cannot be admitted to the receiver until the bolt is fully closed and locked, thereby overcoming a source of much trouble and danger, for should a second cartridge be admitted before the extractor F has caught the first jamming of cartridges would be liable to occur. As the bolt starts on its opening movement the spring 45, pressing against the lever 41, will tend to raise the carrier 50; but with a cartridge thereon said carrier cannot be fully raised until the bolt has moved back to about its open position, when the front end wall of the groove 33 in said bolt will positively actuate the arm 40 of the lever 41 to cause the same to throw up the carrier. As the carrier rises, when the bolt permits this movement, an arm or toe 51 on said carrier comes into engagement with an abutment 53 in the receiver, which forces the rear end of the carrier to the position illustrated in Fig. 16, this movement of said carrier being only permitted when the bolt is approximately to its completely-open position. When the bolt moves forward to close the breech, the cartridge is therefore in position to be struck or engaged by the forward end of said bolt and to be forced thereby into the barrel B, the usual inclined surface 55 being provided to engage the projectile end of the cartridge and guide the same to its seat.

An ejector-pin 56 may be located in the forward end of the bolt for actuation in any wellknown manner.

A coiled spring surrounds the firing-pin 80, so that no matter in what way the head 60 on said pin may be turned the latter will be pressed forward as far as the cam engagement of said head 60, with the striker-head 30, will permit. By adjusting the sleeve 63 in the striker-head the firing-pin may be afforded the range of movement desired.

If it be desired to employ the arm as a single-loader, cartridges may be fed by hand to the receiver when the bolt is fully retracted.

When a magazine is employed, a series of cartridges is fed by a clip or otherwise thereto, and the cover thereof is closed. The handle 18 of the lever 16 is now grasped, and said lever swings on the pivot or pintle and through the projection 24 on sleeve 5 and socket in the lever imparts a turning movement to the bolt to set the firing-pin by forcing back the striker-head and to cause the screw-threaded connections 2 3 to impart thereto a preliminary backward movement, and after this action has taken place the lever 16 is thrown to such a position that it will be substantially in line with the axis of the bolt and may be freely moved backward to withdraw said bolt and its connections from the breech opening or bore of the gun, as shown in Fig. 16. At the limit of its rearward stroke the cartridge-carrier 50 is operated in a manner hereinbefore described to bring a new cartridge into position to be engaged by the bolt on its forward reciprocation and to be forced into the barrel by said bolt. As the bolt moves forward the arm of lever 41, which enters the groove 33 on its under side, prevents it from turning and looks it against movement only in a line parallel with its longitudinal axis; but when said arm 40 comes in contact with the rear end wall of the groove 33 a turning movement of the bolt is permitted, the arm 40 entering the lateral extension 34 of said groove, the walls of which act to throw down the lever 41, and thereby lower the carrier to the position shown in Fig. 8.

As the bolt moves forward sear H projects into the path of movement of the extension 70 of striker-head 30, and thereby retains the firing-pin connected with said head in readiness to explode a cartridge when the sear is withdrawn by the trigger in the usual manner. Should it be desired to adjust the head of the firing-pin to limit the forward motion of said pin, the sleeve 63 is manipulated by means of a wrench placed in a slot in its forward end to cause said sleeve to move either backward or forward in the striker-head 30, as above described. When the bolt is advanced sufficiently to cause the screw-threaded segments 3 to engage, it is positively drawn forward by said segments to the limit of its stroke and is locked in such position.

As will be observed, the segments of threads at the forward end of the bolt are of about the same diameter as the body of said bolt, whereas those sections of thread intermediate the length of the bolt are of larger diameter than said bolt, thereby affording great strength where most needed and also enhanced surface speed in throwing the bolt to its locked position.

As set forth in my patent dated April 4, 1899, No. 622,443, the cartridge-carrier is provided with a side flange 50 for closing the magazine at certain times; but no claim is made to this feature in the present application.

My invention is not limited to the precise details of construction of the mechanism shown and described, for many modifications could be made therein without departure from the scope thereof. Neither is the invention limited to what are known as boltguns or turn-bolt guns, for certain details of its construction may be employed in other classes of firearms.

Having thus described my invention, what I claim is 1. In a firearm, the combination, with a frame having a side opening, of a magazine; a cartridge-carrier in said frame; a lever to which said carrier is pivoted, said lever having a projecting arm; a bolt having screwthreads adapted to engage with similar threads in the frame, and also having a groove with a lateral extension having inclined walls, the pitch of which is different from that of the screw-threads; and means for actuating said bolt, whereby when the same is closed the inclined walls of said lateral extension will positively force the cartridge-carrier to its retracted position and will lock it in such position.

2. In a firearm, the combination with the frame thereof having segments of screwthreads, of a cartridge-carrier in said frame, a lever having a projecting arm to which said carrier is connected; a reciprocatory bolt having segments of screw-threads at each end and also having a longitudinal groove for receiving the end of said arm; a cam-surface coposition and to lock it positively in such position; and threaded seats in the frame for engaging the threaded surfaces of the bolt.

4:. In a firearm, the combination with the receiver having sets of screw-threads, of a longitudinallygrooved bolt having sets of screw-threads for engagement with those of the receiver; a cartridge-lifter; a pivoted lever connected with said cartridge-lifter and having an arm extending into the groove of the bolt; a lateral extension communicating with said groove and having inclined walls; and means for reciprocating the bolt, and for turning the same to cause the screw-threaded segments thereon to intermesh with the similar segments of the receiver, and also to cause the walls of the extension of the groove to engage the arm of the lever of the cartridgecarrier to force said carrier to its re- -tracted position and to lock the same in such 0 position.

5. In a firearm, the combination, with a reciprocatory bolt, of a bolt-cover movable with said bolt; means for removably connecting the bolt and cover; a collar on the bolt 5 at the rear of said means; and means for actuating the bolt.

6. In a firearm, the combination with a reciprocatory belt, of a bolt-cover; ways in the receiver for guiding said cover, a sleeve to which said cover is attached loosely surrounding the bolt; and means carried by the bolt at the rear of the sleeve for holding said sleeve in position on said bolt.

7. In a firearm, the combination with a bolt 5 and receiver having sections of screw-threads,

of a bolt-cover having a longitudinal reciprocation in the arm; a sleeve removably connected to said cover and permittinga rocking movement of the bolt therein; and a collar attached to the bolt at the rear of the sleeve.

8. In a firearm, the combination with the receiver, having separated sets of screwthreads, of a bolt having sets of screw-threads; a reciprocatory bolt-cover; a sleeve remov- 5 5 ably connected to said bolt-cover and loosely surrounding the bolt; a collar on the bolt in proximity to said sleeve; a lever fulcrumed on the sleeve and bearing on the collar to turn the bolt; and means for preventing a turning movement of the bolt While it is being moved back from its locked position.

0. In a firearm the combination with a bolt, of a reciprocatory cover therefor; a sleeve on the bolt connected to said cover and having means for engaging a guide in the frame; a

pintle on said sleeve; a lover fulcrumed on said pintle; and a collar secured to the bolt and having a projection engaging a socket in the lever, wherebyan initial movement of th?" lever partially rotates the bolt and a continuation of this movement Withdraws the same.

10. In a firearm, the combination with a belt, of a sleeve held against rotation with the bolt; a lever connected to the sleeve and engaging the bolt to partially rotate the same, said bolt having a longitudinal groove with a side extension; a cartridge-carrier; and an arm connected with said carrier and entering the groove of the bolt.

11. In a firearm, the combination with the frame or receiver having a side opening, of a magazine detachably connected to said frame and having an opening communicating with said opening inthe frame; a carrier-lever pivoted in the rear of the receiver; a cartridge-carrier pivoted to said lever and extending in front thereof; abutments in the frame engaging the front extension of the carrier-arm; and a reciprocatory bolt having a groove with a lateral extension having inclined walls on its under side, whereby said cartridge-carrier is depressed by the bolt on the extreme forward movement thereof and is locked in such depressed condition.

12. The combination, with a receiver, of a bolt; means for causing said bolt, when turned, to engage the receiver; a sleeve carried by the bolt; a two-armed lever pivoted to the sleeve; and means connecting an arm of said lever with the bolt, whereby the bolt is turned to release it from, or connect it with, the receiver when said lever is actuated.

13. The combination, with a receiver having sections of screw-threads, of a bolt having sections of screw-threads cooperating with those in the receiver, a sleeve carried by the bolt and fixed against rotation therewith; said sleeve having a projection; a two-armed lever pivoted on said projection, one of the arms of said lever having a socket; and a collar fixed to the bolt and having a projection with which the socket in the arm of said lever engages. V

14. In a firearm, the combination, with a bolt, of a striker-head having an adjustable cam at its rear face; and a firing-pin head having a cam in engagement with said cam on the striker-head, whereby the firing-pin may be retracted by a partial rotation of one of said cams and thus be held in safety position.

15. In a firearm, the combination with the bolt, of a striker-head movable with said bolt and having a cam at its rear face; a firingpin head having a cam in engagement with the cam on the striker-head; and means for rotating one of these parts with respect to the other, whereby the firing-pin may be retracted by a partial rotation of its cam-faced head and thus be held in safety position.

16. In a firearm, the combination, with a belt, of a striker-head carried by such bolt;

' ing-lever connected to the firing-pin head and serving to adjust the position of the cams and 'to indicate the safe position of said firingpin.

17. In a firearm, the combination, with the receiver having sets of screw-threads near both ends, one set being larger in diameter than the other set, of a bolt having corresponding sets of screw-threads, the front set being of the same diameter as the bolt and the rear set of larger diameter than said bolt.

18. In a firearm, the combination, with a receiver having a mutilated screw-thread in its portion adjacent to the barrel and a mutilated screw-thread of larger diameter, of a locking-bolt having locking-threads corresponding to said threads in the receiver.

19. Ina firearm, the combination, with areceiver provided with a locking-seat at its front end near the barrel, and a screw locking-seat of larger diameter, of a bolt having threaded looking-sections adapted to engage the locking-seats of the receiver, and having an intermediate portion and an operating-handle.

20. In a firearm, the combination, with a bolt having a generally-cylindrical body, a forward portion of decreased diameter having a mutilated screw-surface and an intermediate portion of enlarged diameteralso pro vided with a mutilated screw-surface, of a receiver having locking-seats corresponding to the locking portions of the bolt; and a pivoted handle for actuating said bolt.

21. In a firearm, the combination, with breech-closing mechanism, of a firing-pin; a'

' striker-head; a screw-threaded sleeve having a cam-surface at one end adjustably mounted in said striker-head; a cam-head on the firingpin; an extension on the striker-head; and a scar for engaging said extension to retain the firing-pin.

22. In a firearm, the combination, with the barrel thereof, of a bolt; a sleeve attached to said bolt and having a projection; a second sleeve having a pintle; and a two-armed lever pivoted on said pintle, one of the arms of said lever having a socket to receive said projection, the parts of said lever being so disposed that when the lever is thrown up to turn and release the bolt, the longer arm thereof will be substantially in line with the longitudinal axis of said bolt.

- 23. In a firearm, the combination, with a reciprocatory bolt,of a sleeve surrounding said bolt; a'bolt-cover attached to said sleeve; and means connected with the sleeve for rocking the bolt and for reciprocating the same.

24:. In a firearm, the combination, with a reciprocatory bolt, of a sleeve mounted on said bolt and carrying a pintle; a second sleeve attached to the bolt and havingaprojection; a lever pivoted to said pintle and connected with said second sleeve; a striker-head also carried by the bolt and having a forward extension; a sear; and a firing-pin carried by the striker-head and adapted to be released by the sear.

25. In a firearm the combination, with-a bolt, of a firing-pin located therein; a strikerhead carried by the boltand having an adjustable extension through which the firingpin passes; cam-surfaces on the ends of the firing-pin head and said striker-head extension; and means whereby the firing-pin may be set to a safe position.

In testimony whereof I affix my signaturein presence of two witnesses.

I BETI-IEL BURTON.

Witnesses: I

ROBERT E. BURTON, ELIZABETH A. DOYLE. 

